We have DELL T5500 Machines in a customer site used for process control applications. This has OS windows 7 32 bit and has dual screen connected with Nvidia Quadro 295. There are over 125 machines in the site. Out of which 4 machines show an issue.Randomly they are found to be in shutdown during early hours.How to find the root cause. All other machines are used by the operators continuously and these are Engineering stations are used only day time. Is the issue caused by temp/faulty hardware/driver. how to find??.
Windows log shows events like
"kernel power manager initiated a shutdown transition"
Event 1074,User32 "The process c:\windows\system32\winlogon.exe has initiated the power off of computer EU2-E-03 on behalf of user NTAuthority\system for following reason
reason code:0x500ff
shutdown type :power off"